Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2b54f942b06898…

MALICIOUS

PDF

93.9 KB Created: 2021-06-28 13:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1423fc2069cfe73a98ef5c564badcd0e SHA-1: e2011373f2030bebc40e51e8f5bf5b6edc00818e SHA-256: ba2b54f942b06898ee0ca3edb66d314486caa1a790fcfccae32d159d8d194e28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely to redirect users to malicious sites. No scripts were extracted, but the PDF structure and URL patterns suggest an attempt to lure users into clicking through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://trans-serwis.com/userfiles/file/11394987378.pdf In PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9f3ed6be5---lafeletiperatiwoj.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/28082998149.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb0dbe3b0e---dufoji.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/c3dccdd9eb57310b0200ee7bb6ff7098/porasejetobebapidira.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/45244486680.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/cc50ebfaae604ffe36ba6e0c667ed212/jugirixipal.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/wuwegurazanojodesofi.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/kadositarojilazufulaz.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/74e886178e744e29b23c579d707d3262/30615067288.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b1d46dc887c---kevekanijupewixukida.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a6617e43f0760d04cc75e0fe8dd1e1a5/71569676201.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/47721757603.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16081efd002283---gavobebupejot.pdfIn PDF document text
    • http://www.saito-ken.jp/userdata/file/74095058190.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/numijelimiru.pdfIn PDF document text
    • http://bienenaktuell.com/sites/bienenaktuell.com/files/file/27194870937.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/80a9fa0d507abfcc6e3eea9a508dcd18/wewozuv.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/pvjrbis3nua9hjgpj4fa7rqth1/definofozubedekusedukuses.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/d320db564b548ac73bc6d78841cfd0c8/zopofar.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/8f6752abbc79f3a6b8c4d31418d2a4ad/7647144030.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/0f73783afde7faa2042e76483126f5e8/98408465700.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d4e8c4100---19709015670.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=diagnosis+and+improvement+of+saline+and+alkali+soilsPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A48 17732 bytes
SHA-256: 5c3386446892cc61911307f7c9f49a36b204533700b36ad4faf751f80fac4401
font_01_sfnt_off000138b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B6 11000 bytes
SHA-256: 519e13742c22e09a1637cfda6af8dea1fb983e045545cbe65bcfc7b1840473e3
font_02_sfnt_off00015218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15218 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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